Room Temp, Outside Air, and Thermo Sensor Circuit

Inspection of room-temperature sensor, outside-air sensor, and air thermo sensor circuits





Troubleshooting Hints

Diagnosis

No. 11. 12 [Fix compartment temperature sensor input signal at 25C (77F).]
No. 13, 14 [Fix outside-air-temperature sensor input signal at 15C (59F).]
No. 21, 22 [Fix fin thermo sensor input signal at -2C (-35.6F).]

Air conditioner control unit terminal voltages